public OpenCLDevice(Context context, OpenCLDeviceType deviceType, int numCUsToReserve, float fractionCUsForIRUpdate,
bool requiresTAN)
{
var deviceSettings = new OpenCLDeviceSettings {
};
deviceSettings.type = deviceType;
deviceSettings.numCUsToReserve = numCUsToReserve;
deviceSettings.fractionCUsForIRUpdate = fractionCUsForIRUpdate;
deviceSettings.requiresTAN = requiresTAN ? Bool.True : Bool.False;
var deviceList = IntPtr.Zero;
var status = API.iplOpenCLDeviceListCreate(context.Get(), ref deviceSettings, out deviceList);
if (status != Error.Success)
{
throw new Exception(string.Format("Unable to enumerate OpenCL devices. [{0}]", status));
}
var numDevices = API.iplOpenCLDeviceListGetNumDevices(deviceList);
if (numDevices <= 0)
{
API.iplOpenCLDeviceListRelease(ref deviceList);
// If we explicitly requested a device that supports TAN, or if we didn't ask for CU
// reservation, but still didn't find any devices, stop.
if (requiresTAN || numCUsToReserve == 0)
{
throw new Exception(string.Format("No OpenCL devices found."));
}
Debug.LogWarning("No OpenCL devices found that match the provided parameters, attempting to " +
"initialize without CU reservation.");
deviceSettings.numCUsToReserve = 0;
deviceSettings.fractionCUsForIRUpdate = 0.0f;
status = API.iplOpenCLDeviceListCreate(context.Get(), ref deviceSettings, out deviceList);
if (status != Error.Success)
{
throw new Exception(string.Format("Unable to enumerate OpenCL devices. [{0}]", status));
}
numDevices = API.iplOpenCLDeviceListGetNumDevices(deviceList);
if (numDevices <= 0)
{
throw new Exception(string.Format("No OpenCL devices found."));
}
}
status = API.iplOpenCLDeviceCreate(context.Get(), deviceList, 0, out mOpenCLDevice);
if (status != Error.Success)
{
API.iplOpenCLDeviceListRelease(ref deviceList);
throw new Exception(string.Format("Unable to create OpenCL device. [{0}]", status));
}
API.iplOpenCLDeviceListRelease(ref deviceList);
}